<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>图片</title>
</head>
<body>
  <img class="set" src="./images/set.png" alt="">
</body>
<style>
  .set{
    display: block;
    width: 100px;
    height: 100px;
    margin: auto;
    animation: fadenum 5s infinite linear;
  }
  @keyframes fadenum{
    100%{transform:rotate(360deg);}
  }
</style>
</html> 